Improvement in grinding apparatus



UNITED STATES cLAUs vAN IIAAGEN, oF PHILADELPHIA, PENNSYLVANIA, AssIeNoE oE/d PATENT GEEICE. j

ONE-HALF HIS RIGHT TO ANTHONY VAN HAAGEN, OF SAME PLACE.

IMPROVEMENT IN GRINDING APPARATUS.

Specification forming part of Letters Patent No. 159,723, dated February 9, 1875; applicatlon led November 28, 1874.

To all whom t may concern:

Be it known that I, GLAUs VAN HAAGEN, of Philadelphia, Pennsylvania, have invented certain Improvements in Grinding Apparatus, of which the following is a specification:

The objects of my invention are, iirst, t0 so combine a grinding-disk with an exterior casing that the latter can be adjusted to the former as it is worn away, the flying of the water from the periphery ofthe disk being thus prevented; second, to include in one casing for the grinding-disk a shield, to prevent the water from iiying from the said disk, and a trough to receive the water and detritus; and, third, to prevent the escape of the water from the disk through that side of the said casing which receives the shaft for carrying the said disk.

These objects I attain in the manner which I will now proceed to describe, reference being had to the accompanying drawing, in which- Figure 1 is a vertical section of my iinproved grinding apparatus; Fig. 2, a side view with the supporting-frame; Fig. 3, a side view without the supporting-frame, and Fig. 4 a transverse vertical section.

In the present instance the grinding apparatus is prepared for attachment to a drill grinding-machine, but it should be understood that it may be applied with advantage to any machine in connection with which tools requirin g sharpening are used, or the apparatus may be separate and distinct from any machine and placed on any frame, stand, or bench.

A represents part of a fixed frame, in which the spindle B of the grinding-disk has its bearing, the said disk consisting, by preference, of an emery-wheel. E is the exterior casing of the grinder, and is composed of two parts secured together, as shown in Fig. 4, the casing being of the form or approximating to the forni shown in Fig. 1, so as to inclose the whole of the grinding-disk, excepting a portion in front, where part of the periphery is exposed for the application thereto of the v drill or other tool to be ground, the edge of the casing terminating in one direction, at a, so as to form a shield for preventing the flyingof water from the casing, and in the opposite direction, at b, so that the lower portion, g, of the casing shall form a trough for the reception of water and detritus. The casing E is secured to the frame A by a bolt, D, the head of which is so adapted to guides e e on one side of the said casing that the latter can be moved to and fro on the head of the bolt when the nut of the latter is loose. The shaft B has a collar, f, which intervenes between the side of the casing and the frame A, and thus serves to maintain the grinding-disk in its proper lateral position, and in that side of the casing through which the shaft passes, has an oblong opening, h, shown by dotted lines in Fig. 3, so as to permit the above-mentioned movement ofthe casing. In order that this oblong opening may alwavs be, covered, whatever may be thc position of the casing, I interpose between the latter and the said casing a plate or disk, G, having an opening so adapted to the collarfon the shaft B that the said plate can turn freely thereon. An inside view of the plate is shown in Fig. 5, on reference to which it will be observed that the plate has a radial slot, m, and this slot is arranged to receive a pin on the side of the casing, so that on adjusting the latter on the bolt D the plate will turn, and always so adjust itself as to cover the oblong opening and prevent the escape through the same of gritty water which would otherwise 'gain access to and injure the journal and bearing of the shaft B. The plate G is, in the present instance, made circular, but it may be of any other shape, providing it covers the oblong opening, no matter what position the casing may be adjusted to. The importance of this adjustability of the casing will be understood when it is remembered that the grinding-disk must revolve at great speed, and that the casing may be so adjusted that the inwardly-curved termination a of the edge of the casing shall be as close as possible to the periphery of the grinding-disk without being in actual contact therewith, thereby preventing the dispersing of the water by centrifugal force, this adjustment being required from time to time as the disk is worn away.

In the present instance I have shown on the top of the casing a table, n, for supporting a vessel containing a supply of Water, which may be conveyed to the grinding-disk in any suitable manner, or a supply of water may be supplied by any other means, by a pump, for instance, operated from the same source as the shaft B.

I prefer to make the casing E wider at the back than at the front, Where it may be but little wider than the grinding-disk is thick, as shown in the plan view, Fig. 6, so that there may be as little opportunity as possible for the Water to ily from the casing, the Widelrear of the latter, however, atfordin g sufficient space for the dispersion of the water from the grinding-disk to the interior of the casing, whence it lows to the trough q below.

I claim as my inventionl. The combination, in a grinding apparatus, substantially as described, of a grindstone with a spindle arranged to revolve in fixed bearings, with a combined trough and shield made adjustable in respect to the said spindle.

2. The combination of the shaft B carryingv C. VAN HAAGEN.

Witnesses:

HUBERT HowsoN, HARRY SMITH. 

